JP2013542396A - Fluid heating device - Google Patents

Abstract

  A fluid heating device 1 that raises the temperature of a fluid, and is connected to a heater heat generating part 10b that generates heat and a fluid supply source 3 that supplies the fluid, and is generated by the heater heat generating part 10b by circulating the fluid inside. A heat exchange flow path 2 for exchanging heat between the heat and the fluid, and the heat exchange flow path 2 is communicated in the circumferential direction and separated from the fluid inlets 20b to 23b and the fluid inlet by a half circumference in the circumferential direction. A plurality of annular pipes 20 to 23 having fluid communication ports 20c to 23c provided in the cylinder are juxtaposed in layers so that the fluid inlets of the adjacent annular pipes are displaced by a half circumference in the circumferential direction, and are adjacent to the fluid communication ports of the annular pipes. The fluid inlet of the annular pipe is connected by one communication pipe 30 to 32, and the heater heat generating portion 10b is accommodated and arranged in each of the annular pipes 20 to 23.

Description

  The present invention relates to a fluid heating apparatus.

  As a conventional fluid heating device, a steam boiler that heats purified water by using heat of a heat generator and generates steam is known (for example, see Patent Document 1). The steam boiler described in Patent Document 1 includes a heat generation device and a heat exchange channel that is provided in parallel with the heat generation device and into which purified water is supplied.

  The heat exchange flow path is configured by arranging a plurality of annular tubes communicating in the circumferential direction in parallel in the vertical direction. In each annular tube, a plurality of inflow ports and outflow ports are formed so as to be displaced from each other in the circumferential direction. In addition, the inflow port of the annular tube is communicated with the outflow port of another annular tube by a communication tube. The purified water is supplied to the annular pipe located in the lowermost layer of the plurality of annular pipes arranged in parallel, and sequentially moves to the adjacent annular pipe on the upper side through the communication pipe while being subjected to heat exchange. Eventually, superheated steam is released from the annular tube located in the uppermost layer.

Japanese Patent Laid-Open No. 2001-41668

  In the fluid heating device described in Patent Document 1, in order to effectively use the heat generated by the heat generating device, it is necessary to accommodate the heat generating device and the heat exchange channel in a container having a heat insulating function. is there. For this reason, it is difficult to achieve both improvement in heat exchange efficiency and downsizing of the apparatus.

  Therefore, the present invention has been made to solve such a technical problem, and is a fluid heating device capable of improving the efficiency of heat exchange and reducing the size of the device. The purpose is to provide.

  That is, the fluid heating device according to the present invention is a fluid heating device that raises the temperature of the fluid, and is connected to a heat generation device that generates heat and a supply source that supplies the fluid, and causes the fluid to flow inside. A heat exchange flow path for exchanging heat between the heat generated by the heat generating device and the fluid, and the heat exchange flow path is communicated in the circumferential direction and is connected to the fluid inlet and the fluid inlet in the circumferential direction. A plurality of annular pipes having fluid communication ports provided at portions separated by a half circumference are arranged side by side in layers so that the fluid inlets of adjacent annular pipes are displaced by a half circumference in the circumferential direction, and the fluid communication ports of the annular pipes The fluid inlets of the adjacent annular pipes are connected by a single communication pipe, and the heat generating device is accommodated and arranged in each of the annular pipes.

  In the fluid heating device of the present invention, the fluid flowing in the annular tube of the heat exchange flow path is heated in contact with the heat generating device accommodated in each of the annular tubes, and the temperature rises. Thus, by accommodating the heat generating device inside the heat exchange flow path, the fluid and the heat generating device can be brought into contact with each other to efficiently perform heat exchange. In addition, by accommodating the heat generating device inside the heat exchange channel, it is not necessary to provide a separate space for arranging the heat generating device, and a heat insulating housing that covers the heat generating device and the heat exchange channel is provided. Since it is not necessary, the apparatus can be reduced in size. In addition, the fluid flowing in from the fluid inlet branches in the annular pipe, turns about a half turn toward the fluid communication port, joins, and flows from the fluid communication port through the communication pipe to the adjacent annular pipe. Then, the fluid that has flowed into the adjacent annular pipe branches in the annular pipe, turns about half a circle toward the fluid communication port, joins, and flows out from the fluid communication port. In this way, by arranging the fluid inlets of the annular pipes to be staggered, it is possible to form the fluid flow path as long as possible while reducing the size of the apparatus. Therefore, it is possible to generate a large amount of fluid having excellent temperature uniformity with a miniaturized apparatus.

  Here, a temperature measuring unit that measures the temperature of the fluid flowing out from the heat exchange flow path, and a control unit that controls the amount of heat generated by the heat generating device using the temperature measured by the temperature measuring unit. And may be provided. With this configuration, a fluid having a desired temperature can be obtained by, for example, PID control.

  The heat exchange channel may be supplied with water vapor as the fluid supplied from the supply source. By comprising in this way, the superheated steam of desired temperature can be obtained with little calorie | heat amount compared with the case where purified water is supplied.

  Further, the heat exchange flow path is arranged so that a plurality of the annular tubes overlap in the direction of gravity, and the fluid flows in from the fluid inlet of the annular tube located at the lowermost portion, The fluid may flow out from the fluid communication port of the annular pipe located. By configuring in this way, the fluid sequentially moves from the annular tube located at the lowermost part in the direction of gravity toward the annular tube located at the uppermost part, so that the temperature uniformity of the fluid can be further improved. Since the exhaust heat from the annular tube positioned on the lower side heats the annular tube positioned on the upper side, the entire apparatus can be configured to exhibit a heat retaining effect. For this reason, it is possible to improve the thermal efficiency.

  Further, the heat generating device has a rod shape, and a plurality of the heat generating devices are arranged in the annular tube at intervals in the circumferential direction, and the fluid inlet and the fluid communication port are formed in a region corresponding to the interval. May be. By comprising in this way, the structure which minimizes the useless part which a fluid and a heat generating apparatus do not contact can be implement | achieved in the range which does not inhibit the movement of the fluid to an adjacent annular tube. For this reason, it is possible to further reduce the size of the apparatus and to further improve the responsiveness of the temperature control.

  The heat generating device may be arranged on the basis of a line connecting the fluid inlet and the fluid communication port in one annular pipe. By configuring in this way, temperature uniformity can be further improved.

  Moreover, the said annular tube of the said heat exchange flow path may be comprised so that a rectangle may be exhibited. The heat generation device may be a linear electric heater, and may be inserted into the annular tube from an end of the annular tube. By comprising in this way, a fluid heating apparatus can be comprised with a simple structure.

  Furthermore, one annular pipe and the heat generating device arranged inside the annular pipe are configured as one unit, and a plurality of units are combined in layers. Thus, since it can comprise by a unit unit, the heat exchange flow path of the number of layers according to a use can be formed easily.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the efficiency of heat exchange, it becomes possible to achieve size reduction of an apparatus.

It is a block diagram of the fluid heating apparatus according to the present embodiment. It is a perspective view of the fluid heating device concerning this embodiment. It is a front view of the fluid heating device concerning this embodiment. It is a left view of the fluid heating apparatus which concerns on this embodiment. It is a schematic diagram explaining arrangement | positioning of an electric heater. It is a block diagram explaining the structure regarding fluid temperature control. It is the schematic explaining the flow of the fluid in the heat exchange flow path in FIG. It is a perspective view of the fluid control member arrange | positioned at a heat exchange flow path. It is a schematic diagram explaining arrangement | positioning of the fluid control member shown in FIG. It is a perspective view of the modification of a fluid control member. It is a schematic diagram explaining arrangement | positioning of the fluid control member shown in FIG. It is a perspective view of the modification of a fluid control member.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the dimensional ratios in the figure do not necessarily match those in the description.

  The fluid heating apparatus according to the present embodiment is a fluid heating apparatus that raises the temperature of the fluid by applying heat from a heat source to the fluid, and is suitably employed when, for example, superheating water vapor.

  First, the outline of the configuration of the fluid heating apparatus according to the embodiment of the present invention will be described. FIG. 1 is a configuration block diagram of a fluid heating apparatus according to an embodiment of the present invention. As shown in FIG. 1, the fluid heating device 1 includes a heat exchange flow path 2 that heats the fluid by circulating it inside. The input side of the heat exchange channel 2 is connected to a fluid supply source 3, and fluid such as purified water or steam is supplied from the fluid supply source 3. A heat generation device 10 is accommodated in the heat exchange flow path 2 and is configured to be able to exchange heat by bringing the fluid and the heat generation device 10 into contact with each other. The output side of the heat exchange channel 2 is connected to, for example, a device that uses superheated steam.

  The fluid heating device 1 has a function of adjusting the temperature of the fluid that is output. In order to realize the above function, the fluid heating device 1 includes a temperature sensor (temperature measurement means) 12 that can detect the fluid temperature, and a control unit 11 that can control the heat generation device 10. The temperature sensor 12 detects the temperature on the output side of the fluid heating apparatus 1. As the temperature sensor 12, for example, a thermocouple or a thermistor is used. The control unit 11 is connected to the temperature sensor 12 and the heat generation device 10 and has a function of controlling the amount of heat generated by the heat generation device 10 using the measurement result of the temperature sensor 12.

  Next, details of the individual configurations of the fluid heating device 1 described above will be described. 2 is a perspective view of the fluid heating apparatus according to the present embodiment, FIG. 3 is a front view of the fluid heating apparatus shown in FIG. 2, and FIG. 4 is a left side view of the fluid heating apparatus shown in FIG.

  As shown in FIGS. 2 to 4, the heat exchange flow path 2 of the fluid heating device 1 has a plurality of annular pipes configured by connecting cylindrical pipes in a lattice shape. Here, the case where the heat exchange flow path 2 has the four annular tubes 20-23 is shown as an example. The annular pipes 20 to 23 are connected in the circumferential direction by connecting linear pipes by welding. For example, two main pipes are juxtaposed in parallel, and the main pipes and a pair of connection pipes that are substantially orthogonal to each other are welded and connected in an internal communication state. That is, the annular pipes 20 to 23 have a rectangular shape, and both end portions 20a to 23a of the main pipe are configured to substantially coincide with the end portions of the annular pipes 20 to 23. The sizes of the annular tubes 20 to 23 are substantially the same. The annular tubes 20, 21, 22, and 23 are arranged side by side so as to be layered in the direction of gravity from below. The pipe is made of, for example, stainless steel.

  One end of a straight inflow pipe 40 is connected to the annular pipe 20 located at the lowermost part from the outside of the annular pipe, and a fluid inlet 20b is formed at the connecting portion. On the other hand, the other end portion 40 a of the inflow pipe 40 is provided with a flange so as to function as a connection portion with the fluid supply source 3. In addition, the annular pipe 20 has a communication pipe 30 communicating with the adjacent annular pipe 21 in the gravity direction (stacking direction) at a position facing the fluid inlet 20b, that is, at a position spaced from the fluid inlet 20b by a half circumference in the circumferential direction. The fluid communication port 20c is formed in the connection part.

  The annular pipe 21 adjacent to the annular pipe 20 is formed with a fluid inlet 21 b at a connection portion with the communication pipe 30. In addition, a communication pipe 31 communicating with the adjacent annular pipe 22 is connected to the annular pipe 21 in the direction of gravity at a position facing the fluid inlet 21b, that is, at a position spaced from the fluid inlet 21b by a half circumference in the circumferential direction. A fluid communication port 21c is formed at the connecting portion.

  The annular pipe 22 adjacent to the annular pipe 21 is formed with a fluid inlet 22 b at a connection portion with the communication pipe 31. In addition, a communication pipe 32 communicating with the adjacent annular pipe 23 is connected to the annular pipe 22 in the gravity direction at a position opposite to the fluid inlet 22b, that is, at a position half-circumferentially spaced from the fluid inlet 22b in the circumferential direction. The fluid communication port 22c is formed at the connecting portion.

  The annular pipe 23 adjacent to the annular pipe 22 is formed with a fluid inlet 23 b at a connection portion with the communication pipe 32. In addition, one end portion of the straight outflow pipe 41 is connected to the annular pipe 23 from the outside of the annular pipe at a position facing the fluid inlet 23b, that is, a portion that is separated from the fluid inlet 23b by a half circumference in the circumferential direction. The fluid communication port 23c is formed in the connecting portion. The other end portion 41a of the outflow pipe 41 is provided with a flange so as to function as a connection portion with a device using superheated steam.

  Thus, each of the annular tubes 20 to 23 is connected to each other by one communication tube 30 to 32. The annular pipes 20 to 23 have fluid inlets 20b to 23b and fluid communication ports 20c to 23c provided in a part that is separated from the fluid inlets 20b to 23b by a half circumference in the circumferential direction. A plurality of fluid inlets are arranged in parallel so as to be displaced by a half circumference in the circumferential direction. In addition, the fluid can be introduced from the fluid inlet 20b of the annular pipe 20 located at the lowermost part, and the fluid can flow out from the fluid communication port 23c of the annular pipe 23 located at the uppermost part.

  Further, the inflow pipe 40 is provided with a drain pipe 44 for taking out drain (drainage) generated inside the heat exchange flow path 2. Further, a temperature sensor 12 a for detecting the temperature of the fluid supplied to the heat exchange flow path 2 is provided in the inflow pipe 40. Similarly, a temperature sensor 12 b for detecting the temperature of the fluid output from the heat exchange flow path 2 is provided in the outflow pipe 41.

  Next, the heat generating device 10 disposed inside the annular tubes 20 to 23 will be described. The heat generating device 10 is a device that generates heat by resistance heating or the like, and an electric heater is used here. The electric heater 10 includes a terminal portion 10a and a rod-shaped heater heating portion 10b. The heater heat generating part 10b of the electric heater 10 is inserted along the extending direction of the main pipe from the openings of both ends 20a to 23a of the main pipe of the annular pipes 20 to 23, and is accommodated in the annular pipes 20 to 23. Is done. Moreover, the opening of the both ends 20a-23a of the main pipes of the annular pipes 20-23 is hermetically sealed with the terminal part 10a of the electric heater 10 exposed to the outside of the annular pipe. Here, the heater heating portions 10b of the four electric heaters 10 are inserted into one annular tube. That is, a total of 16 electric heaters 10 are arranged in the heat exchange flow path 2.

  A detailed arrangement of the heater heating portion 10b will be described. In addition, since arrangement | positioning of the heater heat generating part 10b in the annular pipes 20-23 is performed similarly, below, considering the ease of explanation understanding, the annular pipe 22 is demonstrated to an example. FIG. 5 is a schematic diagram illustrating the arrangement of the heater heat generating portion 10 b of the electric heater 10 in the annular tube 22. As shown in FIG. 5, a plurality of heater heat generating portions 10 b are arranged inside the annular tube 22 with an interval L in the circumferential direction. The distance L is, for example, substantially the same as the diameter of the fluid inlet 22b or the fluid communication port 22c, or the diameter of the communication pipe 31 or the diameter of the communication pipe 32. The plurality of heater heating portions 10b are arranged symmetrically inside the annular tube 22 in order to improve the temperature uniformity of the fluid. For example, the heater heat generating portion 10b is disposed on the basis of a line X connecting the fluid inlet 22b and the fluid communication port 22c in the annular tube 22. The heater heat generating portion 10b is arranged such that the distance L between the heater heat generating portion 10b and the fluid inlet 22b or the fluid communication port 22c overlaps in the gravity direction. That is, the heater heat generating portion 10b is not disposed in a region corresponding to the fluid inlet 22b and the fluid communication port 22c (a position overlapping with the interval L in the gravity direction), but is disposed in a region excluding the region. For this reason, the fluid inlet 22b and the fluid communication port 22c are formed in a region corresponding to the interval L (a region overlapping the interval L in the direction of gravity).

  Next, details of the control unit 11 of the electric heater 10 will be described. FIG. 6 is a block diagram illustrating a configuration related to fluid temperature control. As shown in FIG. 6, the electric heater 10 is connected to a primary power supply 13 via a breaker 14 and an SSR (Solid State Relay) 15. The SSR 15 is connected to the control unit 11 and has a switching function for turning on and off the current based on a control signal output from the control unit 11. In other words, the electric heater 10 is configured to be able to execute time proportional control for controlling the output without any step by the SSR 15. The control unit 11 is connected to the primary power supply 13 via the breaker 14 and is configured to be able to control ON / OFF of the SSR 15 by an output signal. The control unit 11 has a function of performing PID control so as to reach the target temperature, and sets an output signal based on the measurement result of the temperature sensor 12b that detects the fluid temperature output from the heat exchange flow path 2. It has a function. With the above configuration, the temperature of the fluid output from the heat exchange flow path 2 is detected by the temperature sensor 12b and output to the control unit 11, and PID control is performed by the control unit 11 so as to reach the target temperature, and the output signal is sent to the SSR 15 Is output and the amount of heat generated by the electric heater 15 is adjusted. As described above, the temperature of the fluid output from the heat exchange flow path 2 is controlled to be the target temperature.

  Next, the flow of fluid flowing through the heat exchange channel 2 will be described. FIG. 7 is a schematic diagram illustrating the flow of fluid in the heat exchange flow path 2. In FIG. 7, the annular pipes 20 to 23 arranged side by side are schematically shown by line segments. Further, both end portions 20a to 23a of the main pipe in the annular pipes 20 to 23 are indicated by large black circles, and the pipe joints are indicated by small black circles. Further, the temperature sensor 12b provided in the outflow pipe 41 is indicated by a white circle.

  As shown in FIG. 7, the fluid is supplied from the fluid supply source 3 to the annular pipe 20 located at the lowermost part through the inflow pipe 40. The fluid that has flowed in from the fluid inlet 20b diverges and revolves approximately half a circumference inside the annular tube 20 toward the fluid communication port 20c. At that time, the fluid is heated in contact with the heater heating portions 10b respectively inserted into the annular tube 20 from the end portion 20a. The heated fluid joins at the fluid communication port 20 c and flows into the adjacent annular pipe 21 through the communication pipe 30.

  The fluid that has flowed in from the fluid inlet 21b branches and turns inside the annular pipe 21 toward the fluid communication port 21c approximately half a circumference. At that time, the fluid is heated in contact with the heater heating portions 10b inserted into the annular tube 21 from the end 21a. The heated fluid merges at the fluid communication port 21 c and flows into the adjacent annular tube 22 through the communication tube 31.

  The fluid that has flowed in from the fluid inlet 22b diverges and revolves approximately half a circumference inside the annular tube 22 toward the fluid communication port 22c. At that time, the fluid is heated in contact with the heater heating portions 10b respectively inserted into the annular tube 22 from the end portion 22a. The heated fluid merges at the fluid communication port 22 c and flows into the adjacent annular tube 23 through the communication tube 32.

  The fluid that has flowed in from the fluid inlet 23b diverges and revolves approximately half a circumference inside the annular tube 23 toward the fluid communication port 23c. At that time, the fluid is heated in contact with the heater heating portions 10b inserted into the annular tube 23 from the end 23a. The heated fluid joins at the fluid communication port 23c, flows out through the outflow pipe 41, and the temperature of the fluid at the time of outflow is measured by the temperature sensor 12b.

  As described above, in the fluid heating device 1 according to the present embodiment, the fluid flowing in the annular tubes 20 to 23 of the heat exchange flow path 2 comes into contact with the heater heating portions 10b accommodated in the annular tubes 20 to 23, respectively. Heated to increase the temperature. By housing the heater heat generating part 10b in the heat exchange flow path 2, the fluid and the heater heat generating part 10b can be brought into direct contact to efficiently exchange heat. Moreover, since the fluid flowing through the annular pipes 20 to 23 is divided, the temperature unevenness of the fluid is eliminated, so that the temperature uniformity of the fluid can be improved. Furthermore, since the fluid merges in the vicinity of the fluid communication ports 20c to 23c, the temperature uniformity of the fluid is improved by the turbulent flow. In addition, when water vapor | steam is supplied from the fluid supply source 3, the superheated steam of desired temperature can be obtained with less calorie | heat amount compared with the case where purified water is supplied. In addition, by accommodating the heater heat generating portion 10b in the heat exchange flow path 2, it is not necessary to provide a space for arranging the heater heat generating portion 10b separately, and the heat insulating property that covers the heater heat generating portion 10b and the heat exchange flow path 2 is provided. Since it is not necessary to provide the housing, it is possible to reduce the size of the apparatus. Further, by arranging the fluid inlets 20b to 23b of the annular pipes 20 to 23 to be staggered, it is possible to form a fluid circulation path as long as possible while reducing the size of the apparatus. Therefore, it is possible to generate a large amount of fluid having excellent temperature uniformity with a miniaturized apparatus.

  Further, in the fluid heating apparatus 1 according to the present embodiment, the temperature sensor 12b that measures the temperature of the fluid that flows out from the heat exchange flow path 2, and the heater heating unit 10b that uses the temperature measured by the temperature sensor 12b. By providing the controller 11 that controls the amount of heat generated, a fluid having a desired temperature can be obtained by PID control and time proportional control.

  Further, in the fluid heating apparatus 1 according to the present embodiment, since the fluid sequentially moves from the annular tube 20 located at the lowermost part in the direction of gravity toward the annular tube 23 located at the uppermost part, the temperature of the fluid is made uniform. In addition to being able to improve further, exhaust heat from the annular tube located on the lower side heats the annular tube located on the upper side, so that the entire apparatus can be configured to exhibit a heat retaining effect. For this reason, it is possible to improve the thermal efficiency.

  Moreover, in the fluid heating apparatus 1 according to the present embodiment, the heater heat generating portions 10b are arranged in the annular pipes 20 to 23 with an interval L in the circumferential direction, so that the heater heat generating portions 10b are in electrical contact with each other. Can be avoided. Furthermore, since the heater heat generating portion 10b can be arranged so that the interval L overlaps the fluid inlets 20b to 23b and the fluid communication ports 20c to 23c when viewed from the stacking direction, the movement of the fluid to the adjacent annular pipe is not hindered. In the range, it is possible to realize a configuration in which a useless portion where the fluid and the heater heat generating portion 10b do not contact each other is minimized. For this reason, it is possible to further reduce the size of the apparatus and to further improve the responsiveness of the temperature control.

  Further, in the fluid heating apparatus 1 according to the present embodiment, the heater heat generating portion 10b is arranged on the basis of the line X connecting the fluid inlet and the fluid communication port in one annular tube, so that the temperature uniformity is further increased. Can be improved.

  Further, in the fluid heating device 1 according to the present embodiment, the drain pipe 44 for taking out the drain generated inside the heat exchange flow path 2 is provided in the lowermost annular pipe 20, so that the fluid is inside the annular pipe. Even when it is liquefied, it can be easily taken out. For this reason, it can be set as the apparatus excellent in maintainability.

  Furthermore, in the fluid heating apparatus 1 according to the present embodiment, the annular tubes 20 to 23 of the heat exchange channel 2 are formed by connecting linear pipes, and the heater heat generating portion 10b is connected to the annular tubes 20 to 23. Since it can insert from an edge part and can be arrange | positioned inside the annular pipes 20-23, it becomes possible to manufacture the fluid heating apparatus 1 by a simple assembly, without requiring a complicated process especially.

  In addition, embodiment mentioned above shows an example of the fluid heating apparatus which concerns on this invention. The fluid heating device according to the present invention is not limited to the fluid heating device according to the embodiment, and the fluid heating device according to each embodiment may be modified or otherwise changed without changing the gist described in each claim. It may be applied to the above.

  For example, in the fluid heating apparatus 1 according to the above-described embodiment, a fluid control member may be disposed inside the heat exchange flow path 2 in order to control the flow of fluid in the heat exchange flow path 2. Below, the detail of a fluid control member is demonstrated. FIG. 8 is a perspective view of the fluid control member 50 disposed in the heat exchange flow path 2. As shown in FIG. 8, the fluid control member 50 has a substantially plate shape, and the main surface has a substantially meniscus shape. The end side of the fluid control member 50 is curved along the shape inside the annular tubes 20-23. The fluid control member 50 is arrange | positioned in the position corresponding to the fluid communication ports 20c-23c in the annular pipes 20-23, for example. In the following, in consideration of the ease of understanding the description, a case where it is arranged in the annular tube 20 will be described as an example. FIG. 9 is a schematic diagram for explaining the arrangement of the fluid control member 50. As shown in FIG. 9, the fluid control member 50 is located inside the annular tube 20 and below the fluid communication port 20 c so that the plate width direction is perpendicular to the extending direction of the annular tube 20. Established. By providing the fluid control member 50 in this way, the fluid swirled inside the annular tube 20 and joined can be smoothly moved to the communication tube 30. Note that the shape of the main surface of the fluid control member 50 is not limited to a half-moon shape, and may be a crescent shape. The fluid control member 50 is not limited to a plate-like member, and may be a member that protrudes into the annular tube. Another example of the fluid control member will be described with reference to FIGS. FIG. 10 is a perspective view of the fluid control member 51 disposed in the heat exchange channel 2. As shown in FIG. 10, the fluid control member 51 has a substantially conical shape, and is disposed, for example, at a position corresponding to the fluid communication ports 20 c to 23 c inside the annular tubes 20 to 23. In the following, in consideration of the ease of understanding the description, a case where it is arranged in the annular tube 20 will be described as an example. FIG. 11 is a schematic diagram for explaining the arrangement of the fluid control member 51. As shown in FIG. 11, the fluid control member 51 is provided inside the annular tube 20 and below the fluid communication port 20 c so that the tip thereof faces the fluid communication port 20 c. By providing the fluid control member 51 in this way, the fluid swirled in the annular tube 20 and joined can be smoothly moved to the communication tube 30. FIG. 12 is a perspective view of a modification of the fluid control member. As shown in FIG. 12, the fluid control member 52 has a substantially conical shape. The arrangement position of the fluid control member 52 and the effect brought about are the same as those of the fluid control member 51 described above, and a duplicate description is omitted. As described above, when priority is given to equalizing the fluid temperature over smooth fluid movement, the fluid control member may not be provided to prioritize the generation of turbulent flow.

  Moreover, although embodiment mentioned above demonstrated the example which inserts the heater heat generating part 10b in all the both ends 20a-23a of the annular tubes 20-23, the heater heat generating part 10b is inserted in all the both ends 20a-23a. It does not have to be.

  In the above-described embodiment, the example in which the heat generation amount of the electric heater 10 is controlled using the result of the temperature sensor 12b that measures the temperature of the output side of the heat exchange channel 2 has been described. The amount of heat generated by the electric heater 10 may be controlled using the result of the temperature sensor 12a that measures the temperature on the inlet side of the heater.

  In the above-described embodiment, the example in which the annular pipes 20 to 23 are made of straight pipes and have a rectangular shape has been described. However, for example, the pipes may be made of curved pipes and have a round shape. Moreover, although embodiment mentioned above demonstrated the example in which the annular tubes 20-23 were comprised by the substantially same magnitude | size, you may be comprised by the annular pipe of a different magnitude | size.

  Furthermore, in the above-described embodiment, one annular pipe may be configured as one unit, and the heat exchange flow path 2 may be configured by combining the units in layers. At this time, one annular tube and the electric heater 10 inserted into the annular tube may be configured as one unit. By comprising in this way, the fluid heating apparatus 1 which has the number of layers according to a use can be formed easily.

DESCRIPTION OF SYMBOLS 1 ... Fluid heating apparatus, 2 ... Heat exchange flow path, 3 ... Fluid supply source, 10 ... Electric heater (heat generating apparatus), 10a ... Terminal part, 10b ... Heater heating part, 11 ... Control part, 12, 12a, 12b ... Temperature sensor, 20-23 ... annular pipe, 20b-23b ... fluid inlet, 20c-23c ... fluid communication port, 30-32 ... communication pipe, L ... interval.

Claims (9)

A fluid heating device for increasing the temperature of a fluid,
A heat generator for generating heat;
A heat exchange flow path connected to a supply source for supplying the fluid and causing the fluid to flow through the fluid to exchange heat between the heat generated by the heat generation device and the fluid;
With
The heat exchange channel is connected in the circumferential direction, and an annular pipe having a fluid inlet and a fluid communication port provided in a part circumferentially separated from the fluid inlet in the circumferential direction includes the fluid inlet of an adjacent annular pipe. A plurality of layers are arranged side by side so as to be shifted by a half circumference in the circumferential direction, and the fluid communication port of the annular tube and the fluid inlet of the annular tube adjacent to each other are connected by one communication tube,
The heat generating device is housed and arranged in each of the annular tubes;
A fluid heating device. Temperature measuring means for measuring the temperature of the fluid flowing out of the heat exchange channel;
A controller that controls the amount of heat generated by the heat generating device using the temperature measured by the temperature measuring means;
A fluid heating device according to claim 1.   The fluid heating device according to claim 1, wherein the heat exchange channel is supplied with water vapor as the fluid supplied from the supply source.   The heat exchange flow path is arranged such that a plurality of the annular pipes overlap in the direction of gravity, and the fluid flows in from the fluid inlet of the annular pipe located at the bottom and is located at the top. The fluid heating apparatus according to claim 1, wherein the fluid flows out from the fluid communication port of the annular pipe. The heat generation device has a rod shape, and a plurality of the heat generation devices are arranged at intervals in the circumferential direction inside the annular tube,
The fluid heating device according to claim 1, wherein the fluid inlet and the fluid communication port are formed in a region corresponding to the interval.   The fluid heating device according to claim 5, wherein the heat generating device is arranged on the basis of a line connecting the fluid inlet and the fluid communication port in one annular pipe.   The fluid heating device according to any one of claims 1 to 6, wherein the annular tube of the heat exchange channel has a rectangular shape.   The fluid heating device according to claim 7, wherein the heat generating device is a linear electric heater, and is inserted into the annular tube from an end portion of the annular tube.   The fluid heating device according to any one of claims 1 to 8, wherein one annular pipe and the heat generating device disposed inside the annular pipe are configured as one unit, and a plurality of units are combined in a layered manner.

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